A reliable airport car service is easy to test before you book, because each point below is either published in writing or it is not. Ask the same questions of every operator and compare the answers side by side.
Licensing. The operator should hold the licence its jurisdiction requires for pre-arranged chauffeured transport. Chauffyr's own fleet in Napa and the San Francisco Bay Area operates under CA PUC TCP #41898-A. In other cities, vetted affiliate partners run each trip, and partners must carry current commercial auto liability insurance and every local chauffeured-transport licence where they operate.
Flight tracking. Give the flight number when you book. A good operator follows the live flight status and times the pickup to the actual landing, so an early or late arrival does not need a rebooking or a phone call from the arrivals hall.
A written wait policy. Look for the included wait in writing, and for when it starts. Chauffyr includes 60 minutes of complimentary wait at commercial airports and 15 minutes at FBOs, both counted from actual landing; after that, extra wait is billed at the vehicle's hourly rate in 15-minute increments, and the desk texts you before any extended-wait charge accrues.
A locked price. The quote should be upfront and should not change after booking for the same trip. Chauffyr quotes in USD and locks the fare when you book; tolls, parking, airport fees and fuel are included, and gratuity is at your discretion.
A desk that answers. Flights land at all hours, so the operator needs a 24/7 desk that can be reached by phone or text and can change a pickup while you are in the air. For trips in several countries, one desk coordinating vetted partners keeps every booking, confirmation and change in one place.